US3442337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for removing particles of dust from the work zones of pneumatic,eroding-type work tools
Assignee: Individual
•
Filing: 1966-10-21
•
Granted: 1969-05-06
•
Expires: 1986-10-21
Abstract
No abstract record available.
Inventors
- 👤 Nils Osten Astrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:20
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/01; E21B21/015; B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; B24; B24B; B24B55/00; B24B55/06; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US981409A
Cited
US1223027A
Cited
US1981570A
Cited
US1985157A
Cited
US3144912A
Cited
US3351143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |